Variable-speed driving mechanism.



y J. J. WALSER. VARIABLE SPEED DRIVING MECHANISM.

. APPLICATION IIIIED OUT. 11, 1909. 967,470, Patented Aug. 16, 1910.

4 SHEETS-SHEET l.

J. J. WALSER. VARIABLE SPEED DRIVING MEGHANISM.

APPLICATION FILED OUT. 11, 1909.

Patented Aug. 16, 1910.

4 SHEETSSIIBET 2.

J. J. WALSER. VARIABLE SPEED DRIVING MEGHANISM. APPLICATION FILED our.11, 1909'.

@WAVQ, Patented Aug. 16,1910.

4 SHEETS-SHEET 3.

J. J. WALSER.

VARIABLE SPEED DRIVING MECHANISM.

Patented Aug. 16, 1910.

4 SHEETS-SHEET 4.

APPLICATION FILED 00T.11, 1909.

srnr

nN'r OFFICE.

, aosnrn a. watsnn, or crrrenco, ILLINOIS, .assrslvon TO THE sassPRINTING rnnss oonrannor ci-rroneo, rLLInoIs, A GORPORATIQN or ILLINOIS.

To all whom it may concern."

VARIABLE-SPEED DRIVING MECHANISM.

scram.

' Be it known that I, Josnrn J. WALSER, a citizen of the United States,residing at Chicago, in the county of. Cook and State of Illinois, haveinvented certain new and useful Improvements in Variable-Speed DrivingMechanism, of which the following is a specification, reference beinghad to the accompanying drawings. y a

My invention relates to variable speed driving mechanism adapted to bedriven by an electric motor, and it is particularly adapted to variablespeed driving mechanism for printing .presses, by means ,of which thepress may be driven at a slow speed and at a higher speed and by meansof which the speed of the press may be changed while the press isrunning from slow speed to high speed.

More particularly, my invention relates to improvements in variablespeed driving mechanism of the general character shown in applicationfor Letters Patent of the United States to me, Serial Nd .t 6,-121,filed December 5, 1908. In these'mechanisms referred to, speakinggenerally, the main driving shaft by which the press or other machinewas driven, was adapted to be driven by a motor running at a constantspeed, and variable speeddriving mechanism was connected with thatdrivin shaft by which the press i might be driven at either a slow speedor a high speed while the main driving shaftwas constantly driven at thesame speed and. with? out stopping the press, and the apparatus wasespecially adapted to thatend.

In my present invention, the variable speed driving mechanism is adaptedto be driven by an electric motor whose speed may be varied, and it isthe object of niy invention to provide a driving mechanism which may beshifted from the low. speed to the high speed while the press is inmotion and in which at the same time that the shift is made the speed ofthe motor may be also varied and shifted gradually from low speed tohigh speed as the change between low speed and high speed in, thedriving mechanism is made. By means of this mechanism, I can obtain amuch greater variation in speed and a more gradual shift from the slowspeed to the high speed of the ultimately driven mechanism, such as aprinting press. I accomplish this object by Specification of LettersPatent. Application filed October 11, 1909. Serial No. 522,128.

Patented Aug. 16, 1910.

the means shown in the drawings and hereinafter specifically described.

That which I believe to be new will be pointed out in the claims.

In the drawings :-Figure 1 is a to or plan view with one of the bedframes ofithe press partly broken away to expose 'the parts below. Fig.2 is an end elevation, showing in dotted lines a part of the pressframeand press driving gears. Fig. 3 is a section on line 33 of Fig. 2. Fig.4 is a detail, being a section on line 4% of Fig. 1. Fig. 5 is a detail,being a section on line of Fig. 3. Fig. 6 is a detail, being a sect onon line 6--6 of Fig. 3. Fig. 7 is an enlarged detail, being a section online 7-7 of Fig. 1. Fig. 8 is an enlarged detail, being a section online 8-8 of Fig. 4. Fig. 9 is an enlarged detail, beinga section on line9-9 ofFlg. 1. Fig. 10 is an enlarg d detail, being a section on line10-10 t Fig. 9. Fig. 10 is a detail, being a view of the stop mechanismby which the devices for changing the speed of the motor may be lockedat which are mounted driving gears 14;-15-.

16 17,-all shown in dotted lines,-the gear 17 me hing with driving gear15 and with a gear 18,also in dotted lines, which meshes with thedriving gear on the driving mechanism hereinafter described.

19 indicates the main driving shaft, which is journaled in the frame 11and is provided upon its outer end with a gear 20 which is driven bymeans of a motor A conventionally illustrated in Fig. 3.

21 indicates a gear which is keyed upon the driving shaft 19.

22 indicates a spider which is revolubly mounted upon the shaft 19adjacent to the gear 21 and is provided with a flange rim 23. v

24 indicates a flexible brake band upon which is mounted a brake shoe25, which, engaging the flange 23 of the spider 22,-is adapted to holdthe same against rotation when applied in the manner hereinafterdescribed.

26-27 indicate small-sized gears which are revolubly mounted on suitablestuds on] the arms of the spider 22 and mesh with the gear 21.

2829 indicate gears which are keyed or otherwise secured to stub-shafts30 which are journaled in the arms of the spider 22 and meshrespectively with the gears 2627.

3132 indicate gears of smaller diameter than the gears 2829' and keyedor otherwise secured to the other ends of the stubshafts 30.

33 indicates a disk which is revolubly mounted upon the shaft 19adjacent to the spider 22, and carries secured thereto by anyappropriate means, as by bolts 34, a gear ring 35, which meshes with thegears 31-32.

36 indicates a ratchet wheel which is keyed or otherwise secured to thehub of the disk 33.

37 indicates a pawl disk which is keyed or otherwise secured upon asleeve 38 which is revolubly mounted upon the shaft 19. The pawl disk 37is provided with pawls 39 which are adapted to be engaged by the ratchetwheel 36 so that when the shaft and ratchet are rotated inthe vdirectionindicated by the arrow on Fig. 5 the sleeve 38 will be carried aroundwith it.

40 indicates a gear which is keyed or otherwise secured to the sleeve38, and,

meshing with the gear 18,through the me-- dium of the gears 1714l516,operates to drive the press.

41 indicates a drum which forms one member of a clutch mechanism-whichis preferably formed integral with the sleeve 38.

42 indicates a flexible brake band to which is secured a brake shoe 43which is adapted when thrown on in the manner hereinafter described tobrake the drum 41 and stop thereof. The inner surface of the rim of theclutch drum 41 and the outer periphery of the clutch 45 arecorrespondingly beveled and the clutch member 45 is provided with aclutch band 47 which is adapted, when the clutch 45 is slid intoengagement with. the clutch drum 41, to engage the inner surface of therim thereof and cause the clutch drum 41 to be driven by the rotation ofthe clutch member 45 on the shaft 19. The hub 46 is provided with aperipheral groove 48.

From the above description, it will be obvious that when the shaft 19 bymeans of the gear 20 is driven in the direction shown by arrows in Fig.2, the gears 2829 will be driven, through the intermediate gears 2627,in the same direction,that

is, in the direction indicated by arrows in the said figure,and if thebrake 25 is free from the rim of the spider 22 so as to permit it torotate, the spider will be rotated in the same direction,that is, in thedirection indicated by arrow on Fig. 2,the gears 3132 traveling aroundon the interior gear ring 35, and the speed at which this revolutionwill occur will depend upon the relative size of the gear 21 and theinterior gear ring 35. When, however, the brake is applied to thespider, in the manner hereinafter described, so as to hold it againstrotation, the ears 28-29 will be merely rotated in their earings,rotating in the same direction the gears 31-32 which are keyed to thesame stub-shafts. This will cause the disk 33 to be rotated upon theshaft 19 and in the same direction, the speed of this rotation,-however,being still further diminished by the difference in size between thegears 2829 and the gears 3132, thus driving the disk at a much slowerspeed than the shaft 19. The engagement of the ratchet wheel 36 with thepawls 39 will drive in the same direction and at the same speed the pawldisk 37, which, being keyed to the sleeve 38, will rotate the gear 40 inthe same direction and at the same speed as the disk 33 and pawl disk37, which, through the medium of the several driving gears. 14 to 18,will drive the press at slow speed. Of course during this movement theclutch members will be thrown out of engagement in the mannerhereinafter described. If now the clutch members are thrown intoengagement by the inward movement of the hub 46, which engagement willbe gradual and not sudden by reason of the beveled engaging surfaces ofthe clutch members, the clutch drum 41 will gradually, as the clutchmembers are thrown into complete and tight engagement, be rotated in thesame direction as the shaft 19 and at the same speed as said shaft,rotating of course in the same direction the ear 40 and driving thepress through the medium of the interposed gearing at high speed. Ofcourse the pawl disk 37 will also be driven at the same speed. The brake25 still being on during the engagement of the clutch members and thespider 22 being therefore held against rotation, the ratchet 36 will bedriven at the slow speed above described, but the pawl 39 will slip overthe ratchet teeth permitting the pawl-disk 37 and connected parts to bedriven at the high speed.

It will be obvious from the above description that the high speedmechanism may thus be put into operative relation withthe press beforethe slow speed is put out of operative relation-therewith, thuspreventing the running of'the press by its mere momentum and consequentslowing down during the period of shifting from one speed to the other.If the brake 25 is then thrown ofi, the spider 22 will be free to rotateand will take up a speed the same as the shaft 19 through the operationof the several gears connected therewith above described.

The relative sizes of the gears will of course be such as to secure thedesired difierence between the slow and the high speeds, and may bevaried to suit the demands of the case, it being obvious that thegreater the difference between the gear 21 and the internal gear 34 andbetween the gears 2829 and 31-32, the greater will be the differencebetween the relative speeds of the shaft 19 and the disk 33 andtherefore between the slow speed andthe high speed of the same. When theclutch membersarc disengaged, the brake 25 also being disengaged, if thebrake 43 is applied, in the man ner hereinafter described, to the drum41, the movement of the driving mechanism will be braked and the pressdriven thereby sto pe'd.

he various parts above described are thrown into and out of engagementby the following mechanism.

49 indicates a rock shaft which is journaled in suitable bearings belowthe base frames 12.

50 indicates a ratchet wheel provided with two sets of teeth 5152, whichis keyed or otherwise secured to the outer end of the rock shaft 49.

53 indicates a hand-lever which is provided at its :u per end with theusual latch 54 which is adapted to engage an arc-bar 55 so as to be heldtherein in either of three.

positions,-that is to say, with the press silenced, with the pressrunning at slow speed, and with'the press running at full speed,asindicated respectively in Fig. 2 by the word Off and by the letters Sand F, the parts in the several figures being represented in theposition in which they are when running at full speed.

56 indicates a pawl which is pivoted on the lever 58 above the ratchetwheel 50 and is adapted to engage the ratchet teeth 51. The pawl 56 isprovided with anarm 56 which is adapted to be engaged by the pin 57mounted in one of the base plates 12 so that when the lever is swungpast the slow speed notch the pawl 56 will be lifted out of engagementwith the teeth 51.

58 indicates a pawl which is pivotally car ried upon the lower arm ofthe lever 53 and is adapted to engage the ratchet teeth 52 of theratchet wheel 50 when the lever is swung to the right toward the offposition.

59 (see Figs. 4 and 9) indicates a sleeve which is secured to therock-shaft 49 and, is provided with a lug 60, which, as is best shown insaid figures, is referabl integral therewith and slopes s 1ghtly-'ownward therefrom when the shaft 49 is in normal position.

61 indicates an arm which is pivotally connected at its upper end with asuitable bracket, as (32, on the under side of the base plate 12, andswings downward therefrom. The arm 61 is provided with a catch 63.which, when the arm 61 is free to swing to its lowest position and therock shaft 49 is rocked as hereinafter described by raising the arm 61,is adapted to drop in behind and below the lug ()0 and prevent the rockshaft 49 from being rocked back into its normal position until the latch63 is disengaged.

64 indicates a cam which is carried upon the lower end of the lever 53and is adapted, when the parts are swung into the position shown in thefigures, to engage the lower end of the arm 61, and, throwing itoutward,

in the position best shown in Fig. to free collar 68, tends toyieldingly hold the rock.

shaft 49 in normal position,that is to say, the position indicated bythe several figures in which both brakes are off.

indicates a lever which is pivotally mounted in a suitable bracket 71which depends from one of the frame bars 12 and is secured thereto. Thelower end of the lever 70 is connected by a link 72 with the lower armof the lever 53, and it carries upon its upper end a beveled segmentalgear 73.

74 indicates a shaft which is journaled in suitable bearings in thebracket 71 and carrics near its outer end a bevel gear 75 which mesheswith the beveled segmental gear 73. "When the lever 53 is rocked .ineither direction, the lever 70 will be correspondingly moved through themedium of the link 72, and, through the medium of the beveled segmentalgear 73 and gear 75, the shaft 74 will be given a partial rotation or berocked in one direction or the other.

7 6 indicates acollar which is secured to the lower end of the shaft- 74and is provided pith an arm 77 extending outward there- Poll).

78 indicates a slide rod whichis slidingly ried uponthe slide rod .7 8between the col- .lars'i83' and 84.

86 indicates a lever which at one end is provided with a fork 87 whichembraces the rod 78 and is adapted to be engaged by collars 82 and 84and at the other end with a fork 88 which. embraces the hub 46 andengages the peripheral groove 48 therein. The

lever 86 is pivotally mounted upon a suit able bracket, as 89, on theframe 11.

It will be obvious from the above description that when the slide rod 78is moved downward in Fig. 1 the collar 82 engaging the fork 87 will rockthe lever in one direcright to left.

tion and throw the clutch members out of engagement. When the slide rodis moved in the other direction, the spring-seated collar 84 will engagethe fork 87, and, rocking the lever 86 in the other direction, will movethe clutch members into engagement. It will also be evident that whenthe lever 53 is moved from right to left in Fig. 2 the relation of theparts is such that the clutch members will be moved toward one anotherand ultimately into engagement, and when the lever is moved in the otherdirection the clutch members will be moved away from each other and outof engagement, the pinned collars 82 and 83 and the springseated collar84 bein suitably spaced on said shaft to permit the engagement of theclutch members at the proper time,that is to say, after the slow speedposition of the lever has been passed in its movement from 90 indicatesa collar-which is keyed or otherwise secured to the shaft 49 and carriesan arm 91 preferably integral therewith. The arm 91 carries aspring-seated pawl 92, best shown in Figs. 1 and 2.

94 indicates a collar which is revolubly mounted on the rock-shaft 49adjacent to the collar 90, and is provided on its periphery with a lug95 which is adapted to be engaged by the pawl 92 when the rock shaft isrotated clock-wise in Fig. 7 so as to rotate the collar 94 in the samedirection. The collar 94 is provided with an arm 96 which projectsupward therefrom and is preferably formed integral therewith.

97 indicates a rod which is pivotally connected at one end with the arm96 and is adapted at its other endto slide freely in and out of anopening 98 in part of the framework 12 (see Fig. 7).

99 indicates a collar which is pinned or otherwise adjustably secured tothe rod 97.

100 indicates a spiral spring which is carried on the rod 97 and bearsat one end upon the collar 99 and at the other end upon the frame 12.The spiral spring 100 tends to yieldingly hold the arm 96 and sleeve 94in the position shown in Fig. 7 and return the same to said positionwhen said arm 96 is rocked to the right in Fig. 7

101 indicates a link, one end of which is pivotally connected with thearm 96 on the collar 94. The other end of the link 101 is pivotallyconnected with an arm 102 which is secured to and preferably formedintegral with a collar 103 secured to a shaft 104 which is rotatablymounted in suitable bearings 105 on the frame 11.

The brake band 42, by means of a rod 106, isconnected with a lug.107upon the arm 102, and the other end of the brake band 42 is secured to asuitable collar 108 loosely .mounted upon the shaft 104. When. the

shaft 49 is rocked clock-wise in Fig. 7 by the swinging of the lever 53to the right and consequent engagement of the pawl 58 with ratchet teeth52 on disk 50, the collar 90 will be rocked with it, the pawl 92engaging the lug 95, rocking the arm 96 against the action of the spring100 and tightening the brake band 42 so as to brake the mechanism. Whenthe shaft 49 is rocked in the other direction so that the pawl 92 isfreed from the lug 95, the spring 100 will immediately rock the collar94 back again and free the brake. 109 indicates a collar which issuitably secured to the end of the rock shaft 49 opposite the lever 53and is provided with an arm 110 preferably integral therewith.

111 indicates a rock shaft which is journaled in suitable bearings 112on the frame 11.

113 indicates a collar which is keyed or otherwise secured to one end ofthe rock shaft 111 in registry with the collar 109 and is provided withan arm 114 projecting upward therefrom and preferably integraltherewith.

115 indicates a link which is pivotally connected at one end to the endof the arm 110 and at the other end with the end of the arm 114,whereby, when said rock shaft 49 is rocked in either direction, the rockshaft 111 will be correspondingly rocked.

116 indicates a collar which is keyed or otherwise secured to the rockshaft 111 in registry with the'spider 22 and is provided upon itsperiphery with suitable lugs 117- 118 preferably formed integraltherewith. By means of flexible rods 119120, the ends of the flexiblebrake band 24 are connected respectively with the lugs 117 and 118. The

" ends of the rods 119120 are screw-threaded oewivo so that they may beadjustably secured to from its off position into the slow position,-thatis to say from right to left in Fig". 2,'--by means of the engagement ofthe pawl 56 with the ratchet teeth 51, the rock shaft .111 will berocked in the opposite direction, tightening the brake band 24: and

thereby braking the spider 22 and holding it against rotation. When thepawl 56 is thrown out of engagement with the ratchet teeth 51 by the pin57 as the lever 53 passes the slow speed position, the spring 69 at oncerocks the shaft 19 clock-wise back again to normal position, which,rotating the rock shaft 111 in the opposite direction, frees the brake25 and permits the spider 22 to rotate. 200 indicates a controller whichis adapted to be connected by suitablewires to the motor A, and isprovided with the usual controller handle 201. The controller may be ofany. well-known type, and the handle is adapted when swung from theo'fi' to slow position to drive the motor at a slow speed and when movedfrom the slow past the several contact pounds 202 to gradually turn onmore and more current to the motor so as to gradually bring it to itsfull speed.

203 indicates a link, one end of which is pivotally connected to thecontroller handle 201 and is provided at its other end with a piston 204which slides air-tight in a dash pot 205 provided at its closed end witha small opening 206 to gradually permit the air behind the piston toescape as the piston is moved inward.

207 indicates a collar which is journaled on the short shaft 208supported in suitable bearings from-the framework. The collar 207 is"provided with two arms 209-210, preferably formed integral with saidcollar. The collar is notched on its periphery so as to form ashoulder21.1 adapted to be engaged by a dog hereinafter described. The upper endof the arm 209 is pivotally connected with the link 203.

212 indicates a rod which is pivotally connected-at one end to the lowerend of the arm 210, and is rigidly connected at the other end with theblock 213 which is rigidly secured within one end of a cylinder 214:.

215 indicates a piston. which is slidingly mounted in the cylinder 21%.

216 indicates a spiral spring. interposed between the block or head 213and the piston 215 inside of the cylinder 214.

217 indicates a piston rod one end of. which is secured to the piston215 and the other pivotally connected with the lower end of the lever53.

218 indicates a lug which, by means of a set-screw or other appropriatemeans, is ad justably secured to the piston-rod 217.

219 indicates a collar Whichis journaled on a suitable shaft 220,supported in suitable brackets from the framework and pro vided with.two arms 221 222 preferably formed integralwvith the collar. c

223 indicates a link one end, of which is pivotally mounted u on the arm221 and the other end passes reely through a block 224 preferably formedintegral with and depending from the collar 20?.

the link 223. 226 indicates a spring which is interposed between theblock 225 and the block 224, and operates by bearing against said block225 when the collar 2241 is held in fined position to force the lowerarm on the collar 219 to the left in liig. 2. 227 indicates a linlr, oneend of which'is connected pivotally with the upper end, of the arm 222and the other end is pivotally connected with the lower end of an arm228 depending from and preferably formed in tegral with a collar 229which is journaled upon a suitable shaft 230 mounted in suitablesupports in the machine,

the collar 229 and projects to the left over the collar 207 so as toengage the shoulder 211 011 said collar 20"? and when so engaged toprevent the counter-clockwise rotation of the collar 20?. The pressureof the spring 226 on the collar 225 and block 224: tends to force therod 223 to the left, rocking the right, and hence, through theconnection of "the link 227, to rock the arm 228 to the right and toyieldingly hold the dog 231 in engagement with the surface of the collar207.

The operation of the above-described mechanism is as follows: When thelever 53 is at full speed position, as shown in the figures, thecontroller handle is also moved to the full speed, the motor is runningat full speed, the clutch members are engaged, both brakes are off, and,the arm 61 being thrown by the cam 64: out of engagement with the lug60, the shaft 19 is yieldingly held in normal position by the spring 69,and the driving; mechanism is running at full speed. If the lever 53 isnow'swung to the right to the off position, the cam 64 will. be movedout of the way of the arm 61 which will allow the arm 61 to drop towardthe normal position with the latch 63 hearing against the surface of thelug 60 and ready to drop into position behind it when the lug 60 israised by the rotation of the rock shaft 4C9 by the movement of thelever in the other direction as hereinafter described. As the lever 53swings away from the full speed position, by the action 225 indicates acollar which is secured to arm 221 to the left and the arm222 to the231indicates a dog which is secured on of the link 72, segmental gear73, bevel gear 75, rock-shaft 74, and link 71, the slide rod 78 will bemoved inward so as to disengage the clutch members by the action of thecollar 82 on fork 87 of lever 86. By the same movement of the lever, thepawl 58, before the lever 53 reaches the oft position, will engage theteeth 52 of the disk 50, rocking the shaft 49 clock-wise. Just beforethe lever reaches the ofi' position, the pawl 92 will by its movementengage" the lug 95 on collar 94, rocking it in the same direction, and,applying the brake 43 to the clutch drum 41, will stop the movement ofthe mechanism and of the press, and the parts will be held in thisbraked position as long as the lever is held in its off position.

At the same time, by this motion of the lever to the'right, thecontroller arm will be swung to the right to the off position. This willbe accomplished by the lower end of the lever 53 pulling the piston-rod217 to the left, pulling with it the cylinder 214 and the rod 212. Thisrocks the lower arm on the collar 207 to the left, and, moving the upperarm to. the right through the medium of the rod 203 swings thecontroller arm to the right to the off position, the parts beingproperly adjusted to so move it, and moving the piston 204 out to theopen end of the cylinder 205. This same movementwill free the lug 218from engage ment with the arm 221 leaving it free to rock under theinfluence of the spring 226. As the collar 207 rocks in a clock-wisedirection, the pawl or dog 231 drops into the notch beyond the shoulder211 and the full movement to the right is such as to carry the shoulder211 somewhat beyond the engaging end of the dog 231 so as to permit itto be moved to the left on the return movement of the lever 53hereinafter described a suiiicient amount to bring the controller arm201 upon the slow speed before the dog engages the shoulder. The machineis now in position to be started.

The lever 53 is now swung to the left, moving of course its lower end tothe right. This pushes the piston rod 217 to the right against thespring 216 in the cylinder 214,

- and, the parts being free to move by reason of the fact that the dog213 is somewhat beyond the shoulder 211 as above described, and thetension of the spring being sufiicient to permit of it, the upper arm209 is ,moved to the left, swin in the controller arm 201 from the offto the slow position, and moving the piston 204 slightly inward into thedash-pot 205. This rocking of the collar 207 slightly to the left orcounter-clockwise brings the shoulder 211 into engagement with the dogor' pawl 231, the parts which operate the controller being thus heldagainst further movement until released as hereinafter described" Thelever eemvo is thus brought into slow position, and the motor is setrunning at slow speed. As soon as the lever 53 begins its movement tothe left, the pawl 56 immediately engages one of the teeth 51 on theratchet 50, moving it contra-clock-wise in the figures, and rocking withit in the same direction the shaft 49 against the action of the spring69. This,

movement first of all releases the pawl 92 from the lug 95, leaving thesleeve 94 free to be rocked by the spring 100 which immediately acts torock the sleeve 94 and free the stopping brake 43 fr.om the mechanism.The same movement of the lever begins to move the slide rod 78, but theparts are so spaced that the collar 84 does not immediately bear uponthe fork 87 to throw the clutch members into engagement until after theslow speed )osition is passed. The rocking of the rock shaft 49,however, immediately begins to tighten the flexible brake band 24 andthus applies the brake 25 to the spider 22, holding the same againstrotation. At the same time the lug 60 is lifted to a position permittingthe arm 61 to move to its lowest position with the latch 63 droppingbelow the lug 60 and preventing the return of the rock shaft 49 by theoperation of the spring 69 to its normal position until after the arm 61is swung out again by the action of the cam on the further movement ofthe lever. When the lever 53 is thus held at the slow speed position,the pawl 56 is still in ehgagement with the teeth 51, but the lever hasmoved into such position that the lug 57 is just ready to act upon thearm 56 of the pawl 56 so as to move it out of engagement with theratchet teeth 51 upon the further movement of the lever 53. The stoppingbrake 43 being thus off, and the spider 22 being held against rotationby the brake 25, the mechanism and the press will be driven at the slowspeed in the manner hereinabove described, and will continue to so rununtil the further movement of the lever. So far, the motor is running atslow speed, and the slow-speed driving mechanism only is engaged.

It now being desired to pass to the high speed, the lever is swung stillfarther to the left toward the position shown in the figures. The pin57, as soon as the lever is swung out of slow-speed position, engagingthe arm .56 of the pawl 56, throws it out of engagement with the teeth51, thus preventing further contra-clock-wise rocking of the rock shaft49, which, however, is prevented tact with the fork 87, rocks the' lever86 and "throws the clutch members intoengagement,

- causing the clutch drum 41 to gradually take the full speed of thedrivin shaft 15) and thus driving the press by the 'ull speed drivingmechanism. As this full speed movement is taken up, and the mechanism isrunning by the engagement of the clutch members, and just as a completeand tight engagement of the clutch members is being made, the can] 64;on the lower end of the lever .33 en 'aging the lower end of the arm 61,pushes it to one side, freeing the latch 63 from the lug This permitsthe spring (59 to at once rock the shaft into normal position, freeingthe brake 25 from the spider 22 and permitting it to take up themovement of the shaft 19. At the same time that the movement of thelever from slow to full speed is causing the operation of the variablespeed driv ing mechanism above described, the move ment of the lowerarm, of the lever 53 to the right is moving the piston-rod. 217 to theright, carrying with it the lug 218. This of course would cause amovement the arm 210 to the right if it were not for the en gagement ofthe pawl 231 with the shoulder 211, which prevents the counterclockwiserotation of the collar 207. The effect of the movement, therefore untilthe shoulder is released from the dog as hereinafter dcscribed, issimply to compress the spring 216 in the cylinder 21%, and the motortherefore during the period of bringing the full speed driving mechanisminto engagement is running at slow speed. The parts, however, are soadjusted that just before the lever reaches the extreme limit of itsmotion to the full-speed position the dog 218 is brought into contactwith the arm 221 on the collar 219, rocking it to the right against theactionof the spring .226. This of course rocks the arm 222 to the left.and, through the medium of the link 227 and arm 228, the pawl or do 231is liftcdout of engagement with the shoulder 211, leaving the collar 207free to rotate. The expansive force, therefore, of the spring in thecylinder 214, compressed as above described, thereupon forces thecylinder 214 to the right in Fig. 2, moving with'it the link 212 and thearm 210, thus moving the arm 20$) to the left, forcing the piston 204into the dash-pot 205, and thereby swinging the controller arm from theslow speed position over the various contacts to the full speedposition. The spring in the cylinder 214, however, does not actinstantly, because the piston 204 in the dash-pot 205 compresses the airbetween it and the end of the cylinder, the air escaping only throughthe small opening 206. This will, of course prevent the instant actingof the spring and therefore will cause the gradual motion of thecontroller arm from slow speed to high speed, passing over the severalcontacts, and thus, the high speed driving mechanism, being alreadyengaged thrown into operative relation with the press, and, as themovement of the lever continues, the driving mechanism is moved intofull speed relation before the slow speed driving mechanism is thrownout of operative relation. This, as has been pointed out, prevents theoccurrence of a period of time between the throwing out of the slowspeed and the throwing in of the high speed during which the press,running by its own momentum only, would slow town enough to causebreakages in the web when the high speed was thrown in. It will also beseen that the motor continues to run at the slow speed substantiallyuntil the high speed driving mechanism is thrown into operative relationand that as soon as that high speed engagement of the driving mechanismis effected the same movement of the lever has caused such movement ofthe parts that the devices which held the controller at the slow speedposition hitherto have been released and the controller arm is graduallymoved so as to gradually increase the speed of the motor from slow speedto high speed. I therefore provide, by the above devices, a mechanism bywhich the relative proportion of the slow speed to the high speed of thepress may be considerably increased by means of which the high speed isnot taken up at once, but, after the driving mechanism has been movedinto high speed position, the speed of the motor or other prime mover isalso gradually and automatically increased so as to gradually increasethe speed of the high speed mechanism until it reaches full speed.

What I claim as my invent-ion and desire to secure by Letters Patentis,"

1. In combination, a prime mover, a controller therefor, a driving shaftdriven by said prime mover, a driving gear, slow speed mechanismconnected with said driving shaft and adapted to be connected with saiddriving gear, high speed mechanism connected with said driving shaft andadapted tobe connected with said driving gear, shifting mechanismconnected with said controller and with said slow speed and said highspeed mechanisms and adapted by its movement to shift said controller toslow speed position, to operatively connect said slow speed mechanismwith said driving car, and then to operatively connect said igh speedmechanlsm with said driving gear, and then to shift said controller tohigh speed position.

2. In combination, a prime mover, a controller therefor, a driving shaftdriven by said prime mover, a driving gear, slow speed mechanismconnected with said driving shaft and adapted to be connected with saiddriving'gear, high speed mechanism connected with said driving shaft andadapted to be connected with said driving gear, shifting mechanismconnected with said controller and with said slow speed and said highspeed mechanisms and adapted by its movement to shift said controller toslow speed position, to operatively connect said slow speed mechanismwith said driving gear, then to operatively connect said high speedmechanism with said driving gear, and then to gradually shift saidcontroller to high speed position.

3. In combination, a prime mover, a controller therefor, a driving shaftdriven by said prime mover, a driving gear, slow speed mechanismconnected with said driving shaft .and adapted to be connected with saiddriving gear, high speed mechanism connected with said driving shaft andadapted to be connected with said driving gear, shifting mechanismconnected with said controller and with said slow speed and said highspeed mechanisms and adapted by its move ment to shift said controllerto slow speed position, to operatively connect said slow speed mechanismwith said driving gear, then to operatively connect said high speedmechanism with said driving gear while said slow speed mechanism isstill" in operative relation with said driving gear, and then todisconnect said slow speed mechanism from said driving gear and shiftsaid controller gradually to high speed position.

4. In combination, a motor, a controller therefor, a driving shaftdriven 'by said motor, a driving gear, slow speed mechanism connectedwith said driving shaft and adapted to be connected with said drivinggear,

, high speed mechanism connected ,with said driving shaft and adapted tobe connected with said driving gear, a lever, mechanism operated by saidlever and connected with said controller and with said low speed andhigh speed mechanisms and adapted by the mechanism connected with saiddriving shaft and adapted to be operatively connected with said drivinggear, a lever, mechanism. connected with said lever and with said slowspeed and said high speed mechanisms and adapted by the movement of saidlever to operatively connect said slow speed mechanism with said drivinggear, then to operatively connect said high speed mechanism with saiddriving gear, and then to release said slow speed mechanism; connectionsbetween said lever and said controller and adapted by the movement ofsaid lever to shift said controller to slow speed position, saidconnections including a spring adapted to be compressed by the movementof said lever and by its resiliency to move said controller from slowspeed to high speed position.

6. In combination, a motor, a controller therefor, a driveshaft, adriving gear, slow speed mechanism connected with said driving shaft andadapted to be operatively connected with said driving gear, high speedmechanism connected with said drivlng shaft and adapted. to beoperatively connected with said driving gear, a lever, mechanismconnected with said lever and with said slow speed and said high speedmechanisms and adapted by the movement of said lever to operativelyconnect said slow speed mechanism with said driving gear, then tooperatively connect said high speed mechanism with said driving gear,and then to release said slow speed mechanism, connections between saidlever and said controller and adapted by the movement of said lever toshift said controller to slow speed position, said connections includinga spring adapted to be compressed by the movement of said lever and byits resiliency to move said controller from slow speed to high speedposition, and also including means connected with said controller andadapted to act against said spring to cause sald controller to shiftgradually from slow speed to high speed position.

7. In combination, a motor, a controller therefor, a drive shaft, adriving gear, slow speed mechanism connected with said driving shaft andadapted to be operatively connected with said driving gear, high speedmechanism connected with said driving shaft and adapted to beoperatively connected with said driving gear, a lever, mechanismconnected with said lever and with said slow speed and said high speedmechanisms and adapted by the movement of said lever to operativelyconnect said slow speed mechanism with said driving gear, then tooperatively connect said high speed mechanism with said driving gear,and then to release said slow speed mechanism, connections between saidlever and said controller and adapted by the movement of said lever ,toshift said controller to slowspeed position, meansadapted toautomatically lock said controller in slow speed position and to bereleased by the further movement of said lever, said connectionsincluding a sprin interposed between said lever and sai controller andadapted to be compressed by the further movement of said lever and byits resiliency to move said controller from said slow speed position tohigh speedposition, and also including means connected with said consaidslow speed and said high speed mechanisms and adapted b the movement ofsaid lever to operative y connect said slow speed mechanism with saiddriving gear, then to operatively connect said high speed mechanism withsaid driving gear, and then to release said slow speed mechanism,connections between said lever and said controller and adapted by themovement of said lever to shift said controller to slow speed position,means adapted to automatically lock said controller in slow speedposition and to be released by the further movement of said lever, saidconnections including a spring interposed between said lever and saidcontroller and adapted to be compressed by the further movement of saidlever and by its resiliency to move said controller froni said slowspeed position to high speed position. ,and also including a dash-pot, apiston therein, and connections between said piston and said controllerand adapted to force said piston into said dashpot when said controlleris shifted from slow speed to high speed position and thereby actagainst said spring. I

9. In combination, a prime movena controller therefor, a main drivewheel having a into and out of operative engagement with said maindrivewheel, and connections between said lever and said controller andadapted to move said controller to slow speed posltion before saidspeed-reducing mechanism is put into operative relation with saiddriving wheel, and, after, said clutch members are brought intoengagement, to move said controller from-said slow speed to high speedposition. a

10. In combination, a motor, a controller therefor, a driving shaftdriven by said motor, a main drive wheel having a clutch member, a co-acting clutch member driven by said driving shaft, speed-reducinggearing connected with said main drive wheel for driving the same fromsaid main driving shaft at a slower speed, ratchet mechanism forconnecting said speed-reducing mechanism with said driving shaft andarranged to' be automatically disconnected from the driving shaft whensaid clutch members cotiperate to increase the speed of the main drivewheel, and shifting mechanism connected with said speed-reducinggearing, with said clutch members, and with said controller, and adaptedby its movement to first shift said controller to slow speed position,then to bring said speed-reducing gearing into operative relation withsaid driving wheel, then to bring said clutch members into cooperativerelation with each other, and then to shift said controller from slowspeed to high speed position.

11. In combination, a motor, a controller therefor, a driving shaftdriven by said motor, a main drive wheel having iL-CllltCll member, aco-acting clutch member driven by said driving shaft, speed-reducinggearing connected with said main drive wheel for driving the same fromsaid main driving shaft at a slower speed, ratchet mechanism forconnecting said speed-reducing mechanism with said drivin shaft andarranged to be automatically disconnected from the driving shaft whensaid clutch members cooperate to increase the speed of the main drivewheel, a lever, connections between said lever and said speed-reducingearing lation with said main drive wheel, connections between saidlever and said controller andadapted by the movement of said lever tomove said controller to slow speed position before said speed-reducinggearing is brought into operative relation with the drive wheel and saidconnections including between said ed to be compressed by the movementof said lever in bringing said .clutch members into cooperative relationand by its resilienc to move said controller from slow spee high s eedposition.

12. n combination, a motor, a controller lever and said controlleradapting, connected :Wltll' said main drive Wheel for driving the samefrom said main-driving shaft at a slower speed, ratchet mechanism forconnecting said speedredueing mechan ism. with said driving shaft andarranged to be automatically disconnected from the driving shaft whensaid clutch members cooperate-toinerease the speed of the main drivewheel,-a=lever connections between said lever andg-said speed-reducinggearing and said clutchv members and adapted to throwthe samei-nto andoutof operative relation with said main drivewheel, connections betweensaidlever and said controller and adapted .by the-movementof, said"lever to move'said' speed-reducing gearing is-bronght into op-' erativerelation Withthe" drive Wheel, said connections including between saidlever and said controll'er adapted to be compressed by themoveinent ofsaid lever in bringing said clutch members into cooperative relation andby its resiliency to move said controller from slow speed tohigh speedposition, and also includingmeans' connectedwith said controller andadapted to act against said spring to cause a gradual movement of saidcontroller from slow speed position to high speed position.

JOSEPH J. WALSER.

- Witriessesf CHARLES E. PIOKARD, W.- H. DE BUsK.

